Muscle cells and skin cells do different tasks because they:

When a starfish, a type of echinoderm, is resting on the seafloor, its _______ face(s) the seafloor, whereas the _______ is on the upper surface of the animal.

Identify the phylum of the specimen below

Which of these statements is FALSE regarding a tunicate?

Echinoderms that have a cylindrical body, reduced tube feet and a crown of tentacles belong to the class

Lineus, the longest animal known, belongs to Phylum

This group of animals are characterized by having ovigerous legs and their organs extend into their legs

Insects that undergo complete metamorphosis are known as

Mi compañía busca un bombero que [blank1] los fuegos sin problema. 

Sessile barnacles that perform suspension feeding belong to order ________